Energy storage product pressure resistance

However, its low compressive strength is inadequate to withstand the severe mechanical stress during battery TRP. According to prior research and empirical evidence, the expansion force of a battery during TR can easily reach or even exceed 10 kN.

The Nyquist plots and DRT curves of 3.5 MPa and 7.1 MPa cells are displayed in Fig. S9. At a low stack pressure of 1.8 MPa, cell resistance increases significantly with the cycle number, whereas the increase in cell impedance remains relatively minimal at 10.6 MPa.

Furthermore, due to the thermal resistance effect of the insulation material, heat transfer is significantly suppressed, and the back surface temperatures of the batteries are no longer significantly higher than the front surface temperatures, as observed in the blank TRP test.

At a low stack pressure of 1.8 MPa, cell resistance increases significantly with the cycle number, whereas the increase in cell impedance remains relatively minimal at 10.6 MPa. The DRT curve shown in Fig. 5 e indicates that the significant increase in impedance at 1.8 MPa is closely associated with the RINT process (second peak in the DRT plot).

The insights gained from this work lay a foundation for optimizing stack pressure as a practical strategy to address critical challenges in ASSLSBs, while also providing valuable guidance for interfacial engineering in all-solid-state batteries, paving the way for their broader adoption in next-generation energy storage systems.

It has been demonstrated that the above defects can be effectively improved, and the stack pressure required for battery cycling can be reduced by employing novel processing techniques, such as the wet slurry process, dry film process, and high-temperature process.